Answer to Question #76477 in Physics for imy

Question #76477

a snowboarder in a race is travelling at 10 m/s as he crosses the finishing line. he then decelerates uniformly until coming to a rest over a distance of 20 m. What is his acceleration as he pulls up

Expert's answer

v_f^2-v_i^2=2as
0^2-〖10〗^2=2a(20)
a=-100/40=-2.5 m/s^2 .

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